Display Management Design

With Oscars for on-screen performance

Estimated reading time: 2 minutes

Sections in this page

• Layouts

Layouts

Layouts are nothing more than rules that specify the format / number of lines / fonts we are going to use on the screen. They are easy to remember once you understand that:

• b stands for bold.
• n stands for normal.
• p stands for picture.
• paging means that if the data doesn’t fit on screen, user will be able to navigate through multiple screens to see the data (e.g a public key).
• Finally, the number of letters used stands for the number of lines

Note that not all combinations of letters are possible. For example paging only exists with bnnn. nnnn only exists on Nano X, etc…

This table contains the most commonly used layouts:

Denomination	Comment	Usage
bn	Bold font for the first line, normal font for the second line.	bn, {"BoldLine", "NormalLine"}
pb	Picture for the first line, bold font for the second line.	pb, {&RefToPicture, "BoldLine"}
pnn	Picture for the first line, normal font for the second line and third line.	pnn, {&RefToPicture, "NormalLine1", "NormalLine2"}
bnnn_paging	Bold first line, normal fonts for the other lines. If the data to be displayed doesn’t fit on a single screen, the user will be able to navigate through different screens to see the whole text.	bnnn_paging, {.title = "BoldLine", .text = "NormalLine"}

Most commonly used layouts

Here is a table that compares how those layouts are displayed on a Nano S and on a Nano X or S Plus.

Notice that the Nano X and S Plus can fit up to 4 lines, whereas the Nano S can only fit 2.

LAYOUT	NANO S	NANO X and S Plus
pb
bn
nn
pnn
bnnn_paging

---

Did you find this page helpful?

How would you improve this page for developers?

I am a developer.
Contributors will be chosen randomly to receive rewards. Check this box to send your email and participate.

Ledger collects your email address to send you rewards for your contribution to improve the Developer Portal documentation. Learn more about how we manage your data and your rights.

By providing your email address, you consent that Ledger may contact you for rewards delivery purposes. If you are part of the randomly selected contributors, we will send you an email to ask for your physical address and if necessary, ask you for additional information on the suggestion you made. Your information will only be available to Ledger and will be retained for no longer than 90 days. It may be transferred to non-European countries that ensure an adequate level of protection or under the standard contractual clauses adopted by the EU Commission.

Please note that you may withdraw your consent at any time, access your data and request their rectification or deletion. You may also request the limitation of the processing of your data. To exercise your rights or for any question on the processing of your data, please contact LEDGER’s Data Protection Officer here. If nevertheless you believe LEDGER did not adequately address your concerns and mishandled your data, you may lodge a complaint with the personal data protection authority of your country.

Icons and interface (Nano)

← Previous

Low-level display management

Next →